const fs = require('fs')

const useRoutes = function(){
  fs.readdirSync(__dirname).forEach(file=>{
    if (file ==='index.js') return;
    const router = require(`./${file}`);
    this.use(router.routes());
    this.use(router.allowedMethods());
  })
}
//相当于app.useRoutes = function()
module.exports = useRoutes;